You have software that manages passwords on your PC -- so why not have the same convenience on your smartphone?
A company called LastPass securely stores all your sign-in passwords and syncs them between your PC and your smartphone. LastPass integrates directly with all major PC browsers -- and, thanks to a recently released addition, it integrates with the excellent Dolphin Browser app for Android as well. (The program does require you to enter a master password each time it's opened, by the way, so your information is always protected.)
The LastPass service costs $1 per month. You can sign up for a two-week trial if you want to test it out. The client app is free.